Compositional optimization of gadolinia-doped ceria treatment for enhanced oxygen reduction kinetics in low-temperature solid oxide fuel cells
2017 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 624, 95-100 p.Article in journal (Refereed) Published
We report the optimization of the dopant concentration of gadolinia-doped ceria (GDC) to enhance the oxygen reduction reaction (ORR) kinetics for low-temperature solid oxide fuel cells (LTSOFCs). Crystalline GDC layers with uniform nano-granular structures were prepared by aerosol-assisted chemical vapor deposition (AACVD) on the cathode side of a GDC electrolyte. The current-voltage (I-V) characteristics and power performances of the AACVD GDC-treated cells were measured and their cathodic reactions were analyzed by electrochemical impedance spectroscopy (EIS) to investigate the effect of GDC treatments with various dopant compositions. The cell treated with Gd0.14Ce0.86O2-delta was found to show an optimized power performance with the best ORR kinetics, due to its nano-granular structure and high concentration of oxygen vacancies. (C) 2017 Published by Elsevier B.V.
Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 624, 95-100 p.
Gadolinia-doped ceria; Oxygen reduction reaction; Low-temperature solid oxide fuel cells; Aerosol-assisted chemical vapor deposition
IdentifiersURN: urn:nbn:se:liu:diva-136306DOI: 10.1016/j.tsf.2017.01.004ISI: 000395215100013ScopusID: 2-s2.0-85010430660OAI: oai:DiVA.org:liu-136306DiVA: diva2:1087967
Funding Agencies|International Research & Development Program of the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [NRF-2014K1A3A1A47067412]; Brain Korea 21 Plus program [21A20131712520]2017-04-102017-04-102017-04-20Bibliographically approved